no space left on deviceon router mr3020

i need help for resolve this problem, i can't install the piratebox system, i have the next error:

[root@OpenWrt:/tmp# opkg update && opkg install piratebox*
Downloading [downloads.openwrt.org].
Updated list of available packages in /var/opkg-lists/attitude_adjustment.
Downloading [stable.openwrt.piratebox.de].
Updated list of available packages in /var/opkg-lists/piratebox.
Installing piratebox (0.2-5) to root...
Collected errors:
* wfopen: //usr/lib/opkg/info/piratebox.control: No space left on device.
* wfopen: //usr/lib/opkg/info/piratebox.postinst: No space left on device.
* wfopen: //usr/lib/opkg/info/piratebox.prerm: No space left on device.
* extract_archive: Cannot make dir /usr/share/piratebox/: No space left on device.
* wfopen: /usr/share/piratebox/OpenWRT.img.gz: No such file or directory.
* wfopen: /etc/piratebox.common: No space left on device.
* wfopen: /etc/init.d/piratebox: No space left on device.
* set_flags_from_control: Failed to open //usr/lib/opkg/info/piratebox.control: No such file or directory.
* pkg_write_filelist: Failed to open //usr/lib/opkg/info/piratebox.list: No space left on device.
* opkg_install_pkg: Failed to extract data files for piratebox. Package debris may remain!
* opkg_install_cmd: Cannot install package piratebox.
* opkg_conf_write_status_files: Can't open status file //usr/lib/opkg/status: No space left on device.
root@OpenWrt:/tmp#
]